Building from a parts kit

I'm sure this has been beat to death, but I can't find any threads on it. I found some AK-74 parts kits available at Atlantic Firearms, no barrel. How hard are these to build? Any special tools besides basic household tools? I've changed a few things around on ARs before, but that's the extent of my gunsmithing knowledge. Anything I need to know about this?

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"Opportunity is missed by most people because it comes dressed in overalls and looks like work." -- Thomas Edison

You need a press a 10 ton plus adapters to press in the barrel you will have to headspace the barrel as you don't have a barrel matched to the bolt, in other words not worth the effort with the kits today especially if you only build one or two.